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Home Gemstones Untreated Gemstones

Untreated Gemstones

Browse our selection of untreated gemstones featuring natural color, clarity and beauty without enhancements.

Untreated Gemstones Weight
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1.29ctw Red Pyrope Garnet, Square, VVS-VS

5 x 5 mm (calibrated)

$ 9.89

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46.18ct Red Strawberry Quartz, Fancy, Opaque

39.3 x 12.1 mm

$ 4.60

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0.47ct Orange Spessartite Garnet, Oval, VS

5.1 x 4.1 mm

$ 14.04

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85.94ct Blue Sodalite, Square, Opaque

27 x 27.1 mm

$ 71.33

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15.09ct Green Maw-Sit-Sit, Baguette, Opaque

14 x 12 mm (calibrated)

$ 33.07

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0.62ct Green Tourmaline, Round, Transparent

5 mm (calibrated)

$ 12.35

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6.36ct Turquoise Aquamarine, Oval, Translucent

16 x 12 mm (calibrated)

$ 131.97

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2.70ct Yellow Cat'S Eye Opal, Oval, Opaque

12 x 8 mm (calibrated)

$ 8.07

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3.77ct Yellow Sphene, Oval, Translucent

10 x 8 mm (calibrated)

$ 20.66

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2.40ctw Green Tsavorite Garnet, Baguette, VS

4 x 2 mm

$ 144.62

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7.41ct Gray Jadeite, Oval, Translucent

16.5 x 12.7 mm

$ 24.35

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16.81ct Violet Amethyst, Flower Cut, Translucent

17.8 x 18.4 mm

$ 55.24

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4.97ct Yellow Rutile Quartz, Oval, Transparent

13 x 9 mm (calibrated)

$ 13.60

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7.62ct Violet Amethyst, Pear Shape, VS

16 x 12 mm (calibrated)

$ 58.43

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2.32ct Orange Moonstone, Cushion, Translucent

8 x 8 mm (calibrated)

$ 4.62

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1.21ct White Sillimanite Cat'S Eye, Oval, Transparent

7.8 x 5.5 mm

$ 3.64

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1.37ct Orange Zircon, Emerald Cut, VVS

7 x 5 mm (calibrated)

$ 22.52

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45.66ct Brown Tiger'S Eye, Pear Shape, Opaque

35.6 x 26.3 mm

$ 21.02

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9.33ct Multicolor Quartz With Marcasite, Oval, Transparent

15.5 x 13.5 mm

$ 61.34

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7.60ct Violet Amethyst, Pear Shape, VVS-VS

16 x 12 mm (calibrated)

$ 58.28

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2.74ct Violet Amethyst, Trillion, VS

10 x 10 mm (calibrated)

$ 21.02

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2.56ct Purple Rhodolite Garnet, Oval, VS

8.6 x 6.8 mm

$ 101.99

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1.55ct Pink Tourmaline, Emerald Cut, VVS-VS

7.6 x 5.9 mm

$ 101.89

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4.20ctw Yellow Citrine, Pear Shape, VVS-VS

8 x 5 mm (calibrated)

$ 26.58

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Why Buy Untreated Gemstones from GemSelect?

Natural Untreated Gemstones

Our untreated gemstones are completely natural and have not undergone any enhancement processes. These gems display their original color and clarity as formed in nature, making them highly valued by collectors, jewelers, and gemstone enthusiasts.

Buy Untreated Gemstones Online

At GemSelect you can easily shop untreated gemstones online with confidence. Our inventory includes carefully sourced loose gemstones from around the world, with full transparency regarding treatments and gem origins.

Natural Untreated Loose Gemstones

Why Choose Untreated Gems?

Untreated gems are prized because they remain exactly as nature created them. Without heat or chemical treatments, these stones offer rarity and authenticity that many collectors and jewelry designers prefer.

Unheated Sapphire and Ruby

Some of the most sought-after untreated gemstones include unheated sapphire and ruby. These rare stones retain their natural color and are highly valued due to the absence of heat treatment commonly used to enhance corundum.

Gemstone Authenticity and Transparency

Every gemstone at GemSelect comes with clear treatment disclosure. When purchasing untreated stones, buyers can be confident they are receiving authentic gems that have not been altered by heat or other enhancement methods.

Untreated Gems for Custom Jewelry

Natural untreated gemstones are perfect for custom jewelry pieces. Their unique appearance ensures every ring, pendant, or pair of earrings features a one-of-a-kind gemstone created by nature.

Rare and Collectible Gemstones

Because many gemstones are routinely treated, truly untreated examples can be relatively rare. Collectors often seek untreated stones because they represent the most natural state of a gemstone.

Learn more about gemstone treatments and natural gem formation on our Gemstone Treatment Guide.

FAQs

What are untreated gemstones?

Untreated gemstones are natural gems that have not been enhanced with heat, chemicals, irradiation, or other treatments. They retain their original appearance as formed in nature.

Are untreated gemstones more valuable?

In many cases untreated gemstones are more valuable because they are rarer than treated stones. Natural color without enhancement is highly prized by collectors and investors.

How can I tell if a gemstone is untreated?

Gemstone treatment is typically determined through gemological testing. Reputable sellers like GemSelect clearly disclose whether a stone is untreated or has received any enhancements.

Which gemstones are commonly untreated?

Some gemstones frequently found untreated include garnet, spinel, peridot, and certain sapphires. However, many gem types may be treated depending on their origin and quality.

Are untreated gemstones suitable for jewelry?

Yes, untreated gemstones can be excellent for jewelry depending on their hardness and durability. Popular choices include sapphire, ruby, spinel, and garnet.

GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

My experience was done with ease

Posted By Barb in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

It was good. There was a large selection at prices I could afford.

Posted By Zorah in February, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Good, hope gem quality is good and genuine

Posted By Varun in May, 2026
Source: Bizrate

Overall Rating -> 8 star ratings

Good prices

Posted By TRM in October, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Found a beautiful opal at a great price. I was not disappointed when it arrived. Even better in person.

Posted By Fried Rice in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Good selection prices are reasonable!

Posted By ToRa62 in April, 2026
Source: Bizrate
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